<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .active{
            font-size: 30px;
            color: red;
        }
        #div1{
            background: blue;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <div id="app">
        {{msg}}
        <br>
        {{1+2}}
        <br>
        {{bol ? '666' : '999'}}
        <br>
        {{arr.join('').split('').reverse().join('')}}
        <br>
        <div class="active" id="div1" v-bind:title="arr">test-div</div>
        <div :class="className" :id="id" :title="arr">test-div</div>
    </div>

    <script src="js/vue.js"></script>
    <script>
        let myApp = new Vue({
            el:'#app',
            data:{
                msg:'123',
                bol:'true',
                arr:[1,2,3,4,5,6,7,8,9],
                className:'active',
                id:'div1'
            }
        })
    </script>
</body>
</html>